1pt An acrylic rod is charged by friction when rubbed against a silk cloth. When brought near a piece of polystyrene foam, the foam is
attracted to the rod. Which of the following is the most reasonable
estimate of the amount of charge on the rod?
O A. 1x10-8 C
O B. 1x10-3 C
O c. 10
OD. 100 C

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

Complete the statement about memory improvement. ( )involves organizing and breaking down information into easier groups to expand capacity. rehearsal is the verbal repetition of information. these techniques are especially important for the improvement of ( ) memory.

Within a pendulum, as potential energy decreases, energy increases. a. heat b. kinetic c. frictional d. gravitational